I would say talk to your Accountant and go for Trust. Trusts is the best way. Your Accountant will work it out for you.
As an Individual there's not alot you can get as tax deduction. As a company you pay straight 30% tax. CGT tax on 50% but Trust you can distribute the profits also you could set up multiple entities under Trust who would trade for you.
Also, pl try to keep receipts and clear records just in case ATO asks. ATO likes auditing when they foresee huge profit possibilities...
Just opinion. Pl discuss with your accountant on the clear advice for the decision.
